docs: def updateResults(self, forward=None):
  
          """
          Reload search results or load another "page".
  
          Parameters
          ----------
          forward : bool or None, optional
              Whether move forwards or backwards (``True`` or ``False``). If ``None``, then first page is loaded.
          """
  
          # this choses data we need.
          files = lambda x: {
              i['snippet']['title'].replace('/', '\\'): YTStor(
                  {'yid': i['id']['videoId'], 'pub_date': i['snippet']['publishedAt']},
                  opts=self.yts_opts) for i in x['items']
          }
          descs = lambda x: {
              (i['snippet']['title'].replace('/', '\\') + '.txt'): YTMetaStor(
                  {
                      'title': i['snippet']['title'],
                      'yid': i['id']['videoId'],
                      'desc': i['snippet']['description'],
                      'channel': i['snippet']['channelTitle'],
                      'pub_date': i['snippet']['publishedAt']
                  },
                  opts=dict()
              ) for i in x['items']
          }
          thumbs = lambda x: {
              (i['snippet']['title'].replace('/', '\\') + '.jpg'): YTMetaStor(
                  {'url': i['snippet']['thumbnails']['high']['url'], 'pub_date': i['snippet']['publishedAt']}, opts=dict()
              ) for i in x['items']
          }
  
          try:
              if self.adj_tokens[forward] is None: # in case someone would somehow cross boundary.
                  forward = None
          except KeyError:
              pass
  
          recv = None
          try:
              try:
                  data = self.avail_files[ self.adj_tokens[forward] ] # maybe data is already available locally.
              except KeyError:
                  recv = self.__search( self.adj_tokens[forward] ) # nope, we have to search.
          except KeyError: # wrong index in adj_tokens
  
              if forward is None:
                  recv = self.__search()
              else:
                  raise ValueError("Valid values for forward are True, False or None (default).")
  
          if recv is not None:
  
              _d = files(recv)
              if self.preferences['metadata']['desc']: _d.update(descs(recv))
              if self.preferences['metadata']['thumb']: _d.update(thumbs(recv))
  
              data = (None, _d) # little format unification.
  
          if len(self.avail_files) > 4:
  
              pop = self.avail_files.popitem(False) # get rid of the oldest data.
              for s in pop[1][1].values(): s.clean()
  
          adj_t = deepcopy(self.adj_tokens) # this will we write to avail_files, now we update self.adj_tokens.
  
          if data[0] is None: # get tokens from obtained results.
              try:
                  self.adj_tokens[False] = recv['prevPageToken']
              except KeyError:
                  self.adj_tokens[False] = None
  
              try:
                  self.adj_tokens[True] = recv['nextPageToken']
              except KeyError:
                  self.adj_tokens[True] = None
  
          else: # already in avail_files.
              self.adj_tokens = data[0]
  
          if forward is not None:
              # backup last results in avail_files:
              self.avail_files[ self.adj_tokens[not forward] ] = (adj_t, self.visible_files)
  
          self.visible_files = data[1]